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The FiiO M33 R2R Digital Audio Player is a portable high-resolution player for listeners who want natural sound at home and on the move. It uses FiiO's true R2R ladder DAC design, delivering precise voltage steps and timing that create a grounded, analogue-leaning presentation you can settle into for hours. You can also switch between OS and NOS modes, so you choose between added precision or a more direct signal path depending on your preference.
Inside, a titanium-based multi-stage amplifier provides clean, stable power. That means sensitive in-ear monitors stay quiet, while full-size headphones sound controlled and confident. And with 3.5mm and 4.4mm outputs, you can connect in the way that suits your setup. The Snapdragon 680 platform keeps Android responsive for streaming and local files alike, while desktop mode with dual USB power reduces interference for longer sessions at your desk. Add up to 12.5 hours of playback and fast, low-temperature charging, and you have a player that fits easily into everyday listening.
Product Ref: 366043
| Name/Model | M33 R2R |
|---|---|
| Hardware solution | SoC: Qualcomm Snapdragon 680DAC: FIIO proprietary R2R DACUSB DAC: XU316 |
| Working modes | Android/Pure Music/AirPlay/USB DAC/Bluetooth reception |
| Colour | Dark blue |
| Weight | About 258g |
| Dimensions | About 138.2x71.5x17mm |
| Volume control | Button control |
| Display | 5.5-Inch (1080x2160) fully laminated screen |
| Internal storage/Usable storage (ROM) | 128GB/About 112GB |
| Memory (RAM) | 8GB |
| Recommended headphone impedance (PO) | 8 350Ω |
| Recommended headphone impedance (BAL) | 8 350Ω |
| Memory card | Supports up to 2TB |
| Channel balance | L20 R20 (0.5dB per level) |
| Gain selection | Over-ear headphone mode (Connect a fast charger)/High/Medium/Low |
| Buttons | Power button*1Volume button*2Multifunction button*1Play/Pause button*1Previous track*1Next track*1 |
|---|---|
| USB | Type-C USB3.0*1 (Charging/Data transfer)Type-C POWER IN*1 (Charging/Independent power supply interface) |
| Slide switch | D.MODE button*1 |
| Headphone output | Standard 3.5mm port |
| Line output | Standard 3.5mm port (shared PO) |
| Coaxial output | Standard 3.5mm port (shared PO) |
| Balanced headphone output | Standard 4.4mm port |
| Balanced line output | Standard 4.4mm port (shared BAL) |
| WiFi | 2.4GHz/5GHz, DLNA/AirPlay/WiFi music transfer |
|---|---|
| Bluetooth transmission (5.0) | SBC/aptX/aptX HD/LDAC/LHDC |
| Bluetooth reception (5.0) | SBC/LDAC |
| Remote control | Supports WiFi control |
| MQA | Supports global decoding |
| ALL TO DSD | Yes |
| PEQ | Supports 10-band PEQ and AUTO EQ |
| Sound profiles | Natural sound/Warmer sound |
| Maximum sampling rates (Local DAC) | Supports up to 384kHz/32bit; DSD256 (Native) |
| Maximum sampling rates (USB DAC) | Supports up to 768kHz/32bit; DSD512 (Native) |
| Maximum sampling rates (USB Audio) | 768kHz/32bit; DSD512 (Supports DoP/D2P/Native) |
| Maximum sampling rates (Coaxial output) | Supports up to 384kHz/24bit; DSD128 (DOP/D2P) |
| Double click to wakeup | Yes |
| Screen rotation | Yes |
| Operation | Supports gesture control, two-button and three-button navigation |
| Power-off timers | Supports idle poweroff/sleep |
| Firmware update | Supports local storage upgrade+microSD card local upgrade+OTA push upgrade |
| Power supply | PD2.0/PD3.0 PPS fast charging |
|---|---|
| Charging time | About 1.5h (PD3.0 PPS fast charging) |
| 3.5mm headphone output battery life | 15.5hVolume level: 43Gain: High gainDisplay status: OFFPlayback track and format: MP3 44kHz/16bitEQ: OFFLoad: 32ΩPersonalised sound: |
|---|---|
| Natural sound (NOS) 4.4mm balanced output battery life | 13.5hVolume level: 31Gain: High gainDisplay status: OFFPlayback track and format: MP3 44kHz/16bitEQ: OFFLoad: 32ΩPersonalised sound: Natural sound (NOS) |
| Output power 1 | L+R≥540mW+540mW (16Ω, THD+N?1 , 2.9Vrms) |
|---|---|
| Output power 2 | L+R≥470mW+470mW (32Ω, THD+N?1 , 3.9Vrms) |
| Output power 3 | L+R≥60mW+60mW (300Ω, THD+N?1 , 4.2Vrms) |
| Output impedance | ?0.8Ω (32Ω) Crosstalk [-] ≥74dB (1kHz@32Ω) |
| Noise floor | ?5.5μV (A-weighted) THD+N [-] PCM: 0.0183 DSD: 0.0033 |
| SNR | ≥117dB (A-weighted) |
| Dynamic range | ≥114dB |
| Frequency response | 20Hz 20kHz: attenuation?1.3dB20Hz 40kHz: attenuation?3dB |
| Peak output voltage | ?12Vp-p |
| Output power 1 | L+R≥465mW+465mW (16Ω, THD+N?1 , 2.7Vrms) |
|---|---|
| Output power 2 | L+R≥300mW+300mW (32Ω, THD+N?1 , 3.1Vrms) |
| Output power 3 | L+R≥50mW+50mW (300Ω, THD+N?1 , 3.9Vrms) |
| Output impedance | ?0.8Ω (32Ω) |
| Crosstalk | ≥74dB (1kHz@32Ω) |
| Noise floor | ?4.9μV (A-weighted) |
| THD+N | PCM: 0.0186 DSD: 0.0033 |
| SNR | ≥116dB (A-weighted) |
| Dynamic range | ≥113dB |
| Frequency response | 20Hz 20kHz: attenuation?1.3dB20Hz 40kHz: attenuation?3dB |
| Peak output voltage | ?10Vp-p |
| THD+N | PCM: 0.0182 DSD: 0.0034 |
|---|---|
| SNR | ≥116dB (A-weighted) |
| Noise floor | ?3uV (A-weighted) Crosstalk [-] ≥103dB |
| Dynamic range | ≥104dB |
| Frequency response | 20Hz 20kHz: attenuation?1dB20Hz 60kHz: attenuation?3dB |
| Line output level | 2Vrms (1kHz@10kΩ) |
| Output power 1 | L+R≥540mW+540mW (16Ω, THD+N?1 , 2.9Vrms) |
|---|---|
| Output power 2 | L+R≥1100mW+1100mW (32Ω, THD+N?1 , 6Vrms) |
| Output power 3 | L+R≥240mW+240mW (300Ω, THD+N?1 , 8.5Vrms) |
| Output impedance | ?1.5Ω (32Ω) |
| Crosstalk | ≥104dB (1kHz@32Ω) |
| Noise floor | ?10.3μV (A-weighted) |
| THD+N | PCM: 0.0171 DSD: 0.0033 |
| SNR | ≥116dB (A-weighted) |
| Dynamic range | ≥115dB |
| Frequency response | 20Hz 20kHz: attenuation?1.3dB20Hz 40kHz: attenuation?3dB |
| Peak output voltage | ?24Vp-p |
| Output power 1 | L+R≥540mW+540mW (16Ω, THD+N?1 , 2.9Vrms) |
|---|---|
| Output power 2 | L+R≥900mW+900mW (32Ω, THD+N?1 , 5.4Vrms) |
| Output power 3 | L+R≥165mW+165mW (300Ω, THD+N?1 , 7Vrms) |
| Output impedance | ?1.5Ω (32Ω) |
| Crosstalk | ≥104dB (1kHz@32Ω) |
| Noise floor | ?9.1μV (A-weighted) |
| THD+N | PCM: 0.0180 DSD: 0.0033 |
| SNR | ≥116dB (A-weighted) |
| Dynamic range | ≥114dB |
| Frequency response | 20Hz 20kHz: attenuation?1.3dB20Hz 40kHz: attenuation?3dB |
| Peak output voltage | ?20Vp-p |
| THD+N | PCM: 0.0163 DSD: 0.0034 |
|---|---|
| SNR | ≥118dB (A-weighted) |
| Noise floor | ?4.9uV (A-weighted) |
| Crosstalk | ≥105dB |
| Dynamic range | ≥114dB |
| Frequency response | 20Hz 20kHz: attenuation?1dB20Hz 60kHz: attenuation?3dB |
| Line output level | 4Vrms (1kHz@10kΩ) |
| Lossless | DSD: DSD64/128/256 (".iso", ".dsf", ".dff"), DST ISODXD: 352.8kHz/24bitAPE FAST/High/Normal: 384kHz/24bit (MAX)APE Extra High: 192kHz/24bit (MAX)APE Insane: 96kHz/24bit (MAX) |
|---|
| Product Code | FIIOM33-BLUE |
|---|---|
| EAN | 6953175761440 |